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Class Information
Number: 250/258
Name: Radiant energy > Geological testing or irradiation > Well testing apparatus and methods > By interface of fluids
Description: Subject matter which includes means to cause two fluids to meet in a well to force one of the fluids into the earth, said one fluid being material or including material which emanates radiation, modified radiation, or causes radiation by interacting with radiation from the means to expose the material to radiation, wherein the means to detect radiation senses the said one fluid at the meeting point of the fluids, and methods corresponding to the apparatus.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7212283 |
Imaging sensor optical system |
May. 1, 2007 |
| 7075063 |
Determining phase transition pressure of downhole retrograde condensate |
Jul. 11, 2006 |
| 6879425 |
Device for determining and/or monitoring the density and/or the level of a filling material in a container |
Apr. 12, 2005 |
| 6749715 |
System and method for analyzing a semiconductor surface |
Jun. 15, 2004 |
| 6596998 |
Method and system for identifying the source of a signal |
Jul. 22, 2003 |
| 6472660 |
Imaging sensor |
Oct. 29, 2002 |
| 6104033 |
Method of determining fluid level and interface in a closed vessel |
Aug. 15, 2000 |
| 5578820 |
Method for determining cement thickness in a well annulus |
Nov. 26, 1996 |
| 5361632 |
Method and apparatus for determining multiphase holdup fractions using a gradiomanometer and a densitometer |
Nov. 8, 1994 |
| 4982086 |
Method of porosity determination in porous media by x-ray computed tomography |
Jan. 1, 1991 |
| 4833321 |
Process for installing a probe for monitoring the position of an interface between two fluids and means for implementing said process |
May. 23, 1989 |
| 4399359 |
Method for monitoring flood front movement during water flooding of subsurface formations |
Aug. 16, 1983 |
| 4342911 |
Focused nuclear interface survey instrument and method of determining density changes in mining and storage wells |
Aug. 3, 1982 |
| 3993904 |
Low-cost but accurate radioactive logging for determining water saturations in a reservoir |
Nov. 23, 1976 |
| 3993903 |
Low-cost but accurate radioactive logging for determining gas saturation in a reservoir |
Nov. 23, 1976 |
| 3993902 |
Radioactive logging for determining oil saturation in a reservoir |
Nov. 23, 1976 |
| 3959647 |
Gamma-ray measuring method for determining an interface between media |
May. 25, 1976 |
| 3940612 |
Method for detecting and locating water-producing zones and/or water thief zones in subterranean formations |
Feb. 24, 1976 |
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